Detailed Product Description Model:3A AVRType:AVR ,stabilizer.automatica voltage regulator,brushless AVR.Features:Universal 3 Amp 1/2 Wave Self Excited Automatic Voltage Regulator Features< ±0.5% Regulation 200 or 400 VAC Sensing, Jumper SelectableFor use in 50/60 Hz Brushless GeneratorsSoft Start Voltage RampingUnder Frequency Roll Off ProtectionWith Under Frequency LED Indicator